Table 2 Characteristics of the examined fish.

From: Annual gonadal cycle of the invasive catfish brown bullhead Ameiurus nebulosus from an oxbow lake of Vistula river, Poland

Sex

Total length [cm]

Standard length [cm]

Fish weight [g]

CF

Gonad weight [g]

GSI

Mean ± SD range

♀ Female

16.9±3.42

8.6–25.4

14.3±2.97

7.2–22.7

59.1±36.55

6.7-217.5

1.8±0.31

0.9–2.6

0.02-27.0

0.04–8.9

♂ Male

17.6±4.42

8.7–30.5

14.7±3.76

7.4–25.5

74.3±59.06

7.8-481.3

1.8±0.29

0.9–2.9

0.02–1.24

0.04–1.2

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